Disabling the DC states when it's already disabled is a valid scenario,
for example during HW state sanitization during driver loading and
resuming or when DC states are disabled via the i915.enable_dc or
disable_power_well option.
CC: Patrik Jakobsson <patrik.jakobsson@xxxxxxxxxxxxxxx>
Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx>
Reviewed-by: Patrik Jakobsson <patrik.jakobsson@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_runtime_pm.c | 41 +--------------------------------
1 file changed, 1 insertion(+), 40 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index f0ca5134..09c52b1 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -458,8 +458,6 @@ static void assert_can_enable_dc9(struct drm_i915_private *dev_priv)
static void assert_can_disable_dc9(struct drm_i915_private *dev_priv)
{
WARN(intel_irqs_enabled(dev_priv), "Interrupts not disabled yet.\n");
- WARN(!(I915_READ(DC_STATE_EN) & DC_STATE_EN_DC9),
- "DC9 already programmed to be disabled.\n");
WARN(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5,
"DC5 still not disabled.\n");
@@ -602,18 +600,6 @@ static void assert_can_enable_dc5(struct drm_i915_private *dev_priv)
assert_csr_loaded(dev_priv);
}
-static void assert_can_disable_dc5(struct drm_i915_private *dev_priv)
-{
- /*
- * During initialization, the firmware may not be loaded yet.
- * We still want to make sure that the DC enabling flag is cleared.
- */
- if (dev_priv->power_domains.initializing)
- return;
-
- assert_rpm_wakelock_held(dev_priv);
-}
-
static void gen9_enable_dc5(struct drm_i915_private *dev_priv)
{
assert_can_enable_dc5(dev_priv);
@@ -638,29 +624,6 @@ static void assert_can_enable_dc6(struct drm_i915_private *dev_priv)
assert_csr_loaded(dev_priv);
}
-static void assert_can_disable_dc6(struct drm_i915_private *dev_priv)
-{
- /*
- * During initialization, the firmware may not be loaded yet.
- * We still want to make sure that the DC enabling flag is cleared.
- */
- if (dev_priv->power_domains.initializing)
- return;
-
- WARN_ONCE(!(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC6),
- "DC6 already programmed to be disabled.\n");
-}
-
-static void gen9_disable_dc5_dc6(struct drm_i915_private *dev_priv)
-{
- assert_can_disable_dc5(dev_priv);
-
- if (dev_priv->csr.allowed_dc_mask & DC_STATE_EN_UPTO_DC6)
- assert_can_disable_dc6(dev_priv);
-
- gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
-}
-
void skl_enable_dc6(struct drm_i915_private *dev_priv)
{
assert_can_enable_dc6(dev_priv);
@@ -673,8 +636,6 @@ void skl_enable_dc6(struct drm_i915_private *dev_priv)
void skl_disable_dc6(struct drm_i915_private *dev_priv)
{
- assert_can_disable_dc6(dev_priv);
-
DRM_DEBUG_KMS("Disabling DC6\n");
gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
@@ -828,7 +789,7 @@ static bool gen9_dc_off_power_well_enabled(struct drm_i915_private *dev_priv,
static void gen9_dc_off_power_well_enable(struct drm_i915_private *dev_priv,
struct i915_power_well *power_well)
{
- gen9_disable_dc5_dc6(dev_priv);
+ gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
}
static void gen9_dc_off_power_well_disable(struct drm_i915_private *dev_priv,
--
2.5.0
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